Apparatus for forming concrete structures.



A. S. MERRTETT.

APPARATUS FOR FORMING CONCRETE STRUCTURES.

APPLxcATIoN min Nov. 3. 1913.

' lgl'gw., Patented May 4,1915.

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ALVA S.

MERRIETT, OF LOS ANGELES,

CALIFORNIA.

APPARATUS FOR FORI/LING CONCRETE STRUCTURES.

Lievens.

Application filed November 3, 1913.

To all 'whom t may concern Be it known that I, ALVA S. Mnnnrnr'r, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Apparatus for Forming Concrete Structures; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had tothe accompanying drawings, and to the letters and figures -of reference marked thereon, which form a part of this speciication.

My invention relates to an apparatus for forming concrete structures, and more particularly to forms for use in making concrete walls, the principal object of the invention being to provide a clamp which may be carried on the wall forms and attached to tie rods by which the forms are connected, to hold same in spaced relation while a wall is being poured. In accomplishing this object I have provided the improved details of structure hereinafter described and illustrated in the accompanying drawings, wherein Figure I is a side elevation of a portion of a wall form, showing the method of using my improved clamp. Fig. II is a cross-section on the line II-II, Fig. I. Fig. III is an enlarged perspective view of a clamp and the wall form members to which the clamp members are attached. Fig. IV is a detail perspective of one of the clamp ears, showing the outer face of the ear. Fig. V is a similar view, showing the inner face of the ear. Fig. VI is a longitudinal section of a tubular cross-bar and one of the clamp ears, with its bracket. Fig. VII is an interior perspective of part of a wall form, illustrating a slip joint for the form members. Fig. VIII is a perspective view of inner and outer clip joint members.

Referring more in detail to the parts :4- 1 designates sections of a wall form, each of which comprises a wood frame 2 having a sheet metal covering 3, and having notched corners 4 for receiving the cross or tie bars 5, which are preferably tubular. v

Fixed in each corner of each form section is a cast bracket 6, having a slot 7 for receiving a bolt, or the like, 9, by which clamping ears 10 are attached to the bracket.

Specification of Letters Patent.

Patented May 4, 1915.

serial No. 798,941.

Each of the clamping ears 10 comprises a head 11, having a slot 12 adapted to overlie a bracket slot 7, a flange 13 for spacing the head from the bracket and forming a chamber 14 for containing a nut 15, and ribs 16 for bracing the head laterally from the face of the bracket.

Integral with the head 11 and spacedk Jfrom the plane thereof, by a neck 18, is a body portion 19, having a hook 20 thereon, comprising a shank 21, having a tip 22 adapted for projection into a socket 24 in the cross bar 5.

The bolt member 9 comprises a head 26, which is adapted to bear against the outer face oit' the head 11, a shank 27 which is adapted for projection through the clamp slot 7, the chamber 14, and the bracket slot 7, the nut 15, whereby the shank 27 is attached to the clamp head, and a wing nut 29,

whereby the shank is attached to the form bracket.

In order that the clamps may be used when the joints of the forms are broken,

that is, when the ends of form members inl one tier abut beneath the center of a form member in an upper tier, or vice versa, I' mount one of the brackets 6 at the center of each frame 2, so that a clamp member may be mounted thereon and coperate with the corner members in an adjacent tier to form a triangular clamp that will hold the form members in place, and spaced from their opposite members. I also prefer to provide each of the clamp members with an aperture 30, so that it may be applied to a hook 31 on the form and attached thereto to be carried on the form when the latter is not in use, and be readily at hand when needed.

In order to adapt the forms for use in making different length walls, I provide a slip joint for the form members, comprising plates 33, having laterally turned edge lips 34 provided with inturned flanges 35,

`forming grooves 36, within which the ends of the form members 1 may be projected; it being apparent that the form members may be arranged end to end to form the body of the wall, but that should the desired length or'width of the wall be suchl that a short length form might be required to complete it, one or more of the slip joints may be used to give the form proper length byextending ends of adjacent forms par# tially into the slip joints;

The slip joints are usually and preferably used at the corners of the form, and in order to vproperly till the corners, I fasten rails 38 at the ends of the joint members and place a block 39 in the corner of the formr and bolt same to the rails, so that the inner corner may be formed at a 'right angle, the blocks being preferably raised above the upper end of the forms, so that the upper tier of forms may abut thereagainst. j

Presumingv the vform members to be constructed as described, withv thefbrackets Vfixed thereon at angle corners and in the center, when a form is to be set up, the members are arranged in spaced relation and in tiers, with the joints broken in succeeding Y tiers, as illustrated.

In spacing the form members to form a pouring space therebetween, the cross bars are seated in the corner notches of the lower. tier, and the hooks on the ends of the clamp ears projected into proper apertures in the cross bars andrsecured to the form brackets by projecting the bolts through the bracket slots and tightening the wing nuts 'against vthe inner faces of the brackets. `When two or more tiers have been arranged rand connected in this manner, material is poured into the space between the form members and allowed to set or harden. Nhen the lower portion of a wallhas been ormedin` this manner, the 'lower form members may be removed by, loosening the wing nuts,

Y face of the walls; the cross bars being pulled outvof the wall and the apertures .left by the withdrawal of the cross bars being lled with cement. When the lower form members have vbeen removed, they may be applied at the upper'position in like manner and the process continued until the wall has been built up to the proper height. When the wall has been` completed and the form members are to be moved, or stored, the clamp ears are placed over the hooks 3l and the llatter givenk a part turn in order to lock the ears in place, so that they cannot be lost from the form members, but are carried therewith to be readily at vhand when the members are to be moved to a new job.

While form members of different length may be-provided for forming walls of variable length, I prefer to utilize the slip joints heretofore-described, it being apparent that the ends `of the forms may be projected into the slip joints la greater or less distance as necessary, to provide a form of proper length; thereby obviating the necessity for form members of different lengths.

Having thus described my invention,what I claim as new therein, and desirerto secure by Letters-Patent, `is

1. The combination with form members,

removably mounted on said bracketsL and on said members, a cross bar adapted to seat.

in said notches, and clamp members adapted for mounting on said brackets and vfor engagement with said cross bar.

5. The combination with form lmembers having corner notches, of a cross bai' adapted for support in the corner notches of-'s'aid form members and provided with sockets, and clamp members carried by the form members and having tips adapted for pro-- jection in the sockets in said cross bar.

6. Thel combination with `form members having slotted brackets thereon, of a cross bar, clamp members adapted for yconnection with the cross bar,` bolts mounted on the clamp members and adapted for projection through the bracketslots, andv nuts on said bolts adapted for engaging the brackets, for the vpurpose set forth.

7. The combination with form members having slotted brackets, of a cross ba r, clamp members adapted for connection with the cross bar and having slotted heads adapted to overlie the slotted portions of said brackets, bolts attached to said clamp members and adapted for projectionV through the bracket Slots, and wing nuts on said bolts for tightening the clampy members against the brackets.

8. The combination with form members having brackets thereon, of a cross bar, a clamp member adapted for'connection with the cross bar and having a head provided with a chamber and with a slot opening into said chamber, a bolt projected through the slot and chamber, a nut on said bolt withinV the chamber, and means on saidbolt forattaching the clamp head to said bracket.

9. The combination with a form member having a bracket thereon, of a cross bar, a clamp member comprising a slotted head having flanges for spacing the 'head from said bracket, a bolt extending through the head slot and between said flanges, a nut on said bolt between the Hanges for attaching the bolt to said head, and a nut on the inner end of said bolt for attaching the head to said bracket.

10. The combination with a form member having a bracket thereon, of a cross bar, a clamp member comprising a slotted head having flanges for spacing the head from said bracket, a bolt extending through the head slot and between said flanges, a nut on said bolt between the anges for attaching the bolt to said head, a nut on the inner end of said bolt for attaching the head to said bracket, and lips projecting laterally from said iianges and bearing against said bracket.

11. The combination with form members having corner brackets and a bracket near the center of each longitudinal side, of a cross-bar having a plurality oi apertures arranged in spaced planes perpendicular to the aXis of the bar, and clamp members connected with each bracket and having outturned hooks adapted for projection into each of the apertures of one plane of the cross-bar.

12. The combination with form members having corner notches, and brackets secured within each corner oit' said form members opposite said notches, of an apertured crossbar adapted to seat in said notches, and clamp members secured to said brackets and adapted for projection into the apertures of said cross-bar.

13. The combination with form members, of a sliding section comprising a plate having inwardly opening edge grooves adapted for sliding contact with the edges of the form members, and a stiffening bar secured to one edge of the plate and within the edge grooves.

14. The combination with form members of equal length, of sliding sections compris ing plates having edge grooves for receiving said form members and stiliening members at one end, a corner post, means for attaching the Stitl'ening members of the sliding sections to the corner posts to form a corner mold, whereby the ultimate length of a series of form members may be varied by the position of the sliding sections upon the last of the series of form members.

15. The combination with form members of equal length, of sliding sections comprising plates having edge grooves for receiving said form members and stilfening members at one end, a corner post equal in length to the width of the sliding section plates, and means for attaching the stiiening members to said post, so that the post projects beyond the edge of the sliding sections to determine positively the position of succeeding sections.

16. The combination with form members of equal length, of sliding sections comprising plates having edge grooves for receiving said form members and stiffening members at one end, a corner post equal in length to the width of the sliding section plates, and means for attaching said stiffening members to said post in offset relation to form projection and depression joint portions which are adapted for cooperation with similar po-rtions of adjoining sections to aline the mold.

17. The combination with form members having slotted brackets, and an apertured cross-bar, of clamp members comprising body members having offset hook members adapted to bear against said form member and engage said apertured bar, and bolts in said body members adapted for coperation with said slotted brackets to draw said body against the form and eXert a leverage on said bar.

18. The combination with form members having slotted brackets and an apertured cross-bar, of clamp members comprising body portions having oliset hook portions provided with outturned tips adapted for coperation with said apertured bar, and bolts in said body portions adapted for cooperation with said slotted brackets to draw said body portions against said form and exert-a leverage on said bar.

In testimony whereof I aflix my signature in presence of two witneses.

ARTHUR W. CAPs, L. E. CoATs.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

, Washington, D. C. 

